All computers need antivirus software. Some Apple users believe they are immune, but that is a myth; all Mac, Windows and Linux PCs need protection.The only platform immune from virus infection is iOS which is Apple iPads and iPhones.
Samsung Android devices have Knox security built in, but other android devices may need protection depending on your usage.
Windows 10 has the free Defender program built in, which is fine for basic browsing and entertainment, but if you use your computer for online banking, or shop online, or store any sensitive information, then it’s a good idea to have a premium product. If you are a business and store customer data then you should definitely have a good antivirus product.
The market leader changes often in the competitive antivirus world; some companies spend money on research and development and become the best, while others fall by the wayside. There is an element of personal preference and trust too, so there isn’t a truly clear answer.
Norton have traditionally offered the best level of protection, however they have some very poor business practices with subscription renewal; their software has also been accused of slowing computers down. McAfee is my favourite and being owned by Intel gives them good backing.
There are plenty of other paid-for antivirus products but many of them fall short in protection and I can recount dozens of times that PCs and Macs have had issues with the likes of Eset, Sophos, Avast, and AVG.Kaspersky in particular has come under heavy accusation about involvement with Russian state-sponsored espionage, so steer clear of them.
Be wary of the fake antivirus providers out there; these threats known as Trojan horses pretend to offer great features or security but actually cause damage to your computer. Examples like TotalAV, AVSuite, AV Guard, etc.
My advice is tostick with McAfee; don’t waste time with free or cheap antivirus products.